4.2 Effects of Land and Water use (1)

Question 1

tilling

Answer 1

the process of turning soil

Question 2

why is tilling done

Answer 2

to prepare soil for seeding – loosen it to easier plant crops – helps control weeds and pests

Question 3

is tilling bad

Answer 3

tilling is bad when too much happens

Question 4

tilling produces

Answer 4

soil aggregates

Question 5

why is too much tilling bad

Answer 5

compacts lower layers of the soil and makes the top layers so loose that it cant hold water or nutrients – It can blow or rian away

Question 6

what can too much tilling lead to

Answer 6

soil collects in runoff and eroded so soils, nutrients, etc. are washed away

Question 7

slash and burn farming

Answer 7

trees and plants are cut and left to dry and then burned

Question 8

slash In slash and burned is what

Answer 8

the stuff that’s cut up and left to dry

Question 9

why is slash and burning done

Answer 9

ash fertilizes soil temporarily

Question 10

why is slash and burning bad

Answer 10

loss of nutrients and weeds start to grow and lots of CO2 into atmosphere from combustion

Question 11

what do ppl do once the fields are bad bc too much slash and burn

Answer 11

they js move on and abuse some other land

Question 12

what are some alternatives to slash and burn methods

Answer 12

putting animal fertilizer to give them more nutrients or do alley cropping

Question 13

alley cropping

Answer 13

tress and other vegetation are planted in between crops to keep moisture in the soil

Question 14

fertilizers

Answer 14

stuffs that help plants growth

Question 15

how many types of fertilizer are there and what are they

Answer 15

2 –> natural and artificial

Question 16

natural fertilizer examples

Answer 16

manure, left over crops, bones, etc.

Question 17

what particular chemicals are key to plant growth

Answer 17

nitrogen phosphorus and potassium

Question 18

artificial fertilizers

Answer 18

fertilizers that are man made and have more concentrations of nitrogen phosphorous and potassium

Question 19

what is bad about artificial fertilizers

Answer 19

polluted runoff water and local surface water and eutrophication

Question 20

what is good about artificial fertilizers

Answer 20

lots of crops made

Question 21

eutrophication

Answer 21

when there’s too many nutrients in water so algea grows and then no more sun in the lake and then the productivity goes even more down because no energy

Question 22

eutrophicaiton can cause what in lakes

Answer 22

oxygen depletion

Question 23

oxygen depletion due to eutrophication makes what

Answer 23

dead zones of fish and other organisms

Question 24

how can fetiizliers be lessened (artificial)

Answer 24

use compost or less artificial fertilziwrs

Question 25

aquifier

Answer 25

underground layer of porous rock and sediment that contains groundwater

Question 26

what are aquifers important for

Answer 26

source of fresh water, drinking, and crop irrigation

Question 27

Groundwater recharge

Answer 27

the process by which water from precipitation percolates through the soil and makes its way into an aquifer, filling it up

Question 28

do aquifers refill up fast why or why not

Answer 28

no bc groundwater moves rly slow through soil and rock

Question 29

are aquifiers a reliable source for water why or why not

Answer 29

no bc if we take too much it’ll outpace the groundwater recharge cycle and they might get overused and depelted

Question 30

clear cut

Answer 30

forestry practice where most or all trees in an area are uniformly cut down, often to regenerate the stand with a single age class of trees

Question 31

selective cut

Answer 31

timber harvesting method that removes only specific trees based on factors such as size, age, species, and health